共50条信息
直线\(y=kx+1\)与圆\(M:x^{2}+y^{2}-2y=0\)的位置关系是____\(.\)
在极坐标系中,圆\({ }\!\!\rho\!\!{ }={\sin }\theta \)的圆心的极坐标是( )
圆\({{\left( x+1 \right)}^{2}}+{{y}^{2}}=1\)的圆心是抛物线\({{y}^{2}}=2px\left( p < 0 \right)\)的焦点,则\(p=\)____________.
圆\((x-2)^{2}+y^{2}=4\)关于直线\(y= \dfrac{ \sqrt{3}}{3}x \)对称的圆的方程是\((\) \()\)
.已知圆\(C\)的圆心在曲线\(y=\)\( \dfrac{2}{x} \)上,圆\(C\)过坐标原点\(O\),且分别与\(x\)轴、\(y\)轴交于\(A\),\(B\)两点,则\(\triangle \)\(OAB\)的面积等于\((\) \()\)
.已知平面区域\(\begin{cases}\begin{matrix}x\geqslant 0 \\ y\geqslant 0\end{matrix} \\ x+2y-4\leqslant 0\end{cases} \)恰好被面积最小的圆\(C\)\(:(\)\(x-a\)\()^{2}\)\(+\)\((\)\(y-b\)\()^{2}\)\(=r\)\({\,\!}^{2}\)及其内部所覆盖,则圆\(C\)的方程为 .
,已知两点\(P(4,0)\),\(Q(0,2)\),则以线段\(PQ\)为直径的圆的方程是( )
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